David maxwell



(No Model.) I

D. MAXWELL Harvesting Machine. No. 235,548. Patented Dec.14,1880.'

.mwm. v Inveni'o N- PETERS, FHQTO-LITHOGRAPHER, WASHINGTON D C.

UNITED STATES PATENT OFFICE.

DAVID MAXWELL, OF PARIS, ONTARIO, CANADA.

HARVESTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 235,548, dated December 14, 1880.

Application filed August 6, 1880.

To all whom it may concern:

Be it known that I, DAVID MAXWELL, of the town of Paris, in the county of Brant, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Harvesting-Machines, of which the following is a specification.

Myinvention has relation more particularly to improvements in the raking mechanism of reaping-machines of the class in which the rakes are arranged to roll upon a rake-arm when tripped to pass over the table without raking, and my improvements have for their object the production of a simple, strong, and positively-acting tripping mechanism for harvesting-machines of the above-named class.

Referring to the accompanying drawings, Figures 1 and 2 are elevations, and Fig. 3 a plan, of a rake-head, in the construction of which my improvements are embodied. Figs. 4, 5, and 6 are details of the rake-arm.

A is the standard, B the crown-wheel, O the pinion, and D the cam-plate, all constructed and combined substantially in the usual manner.

The rake-bars G are connected by the rakeheads to the rake-arms F. The rake-arms are hinged to the crown-wheel, and are coupled together by compensating-rods in the usual way, so as to operate around the cam-plate with the required eccentric motion.

The rake-arms F are cored throughout their entire length for strength and lightness, and are provided with an offset at or about the point of their connection with the rake-head, in order that the rake-bars G shall be supported at a proper position in relation to the table and rake-standard.

The rake-head is constructed in two independent sections, E E each one of which is made independently adjustable on the rakebar G by means of slots S and bolt T,in order that the separate adjustment of the rake proper to the table and of the friction-rollerH to the roller-track may be accomplished with accuracy and speed.

The rake-head section E is provided with a socket, e, which is fitted upon the turned end of the rake-arm F, and secured thereto by a pin and collar. The rake-arm is retained in (No model.)

position by a spring, I, and stop-block P; but this connection, while sufficient-1y rigid for raking purposes, is flexible to the extent of allowing the rake to roll upon the rake-arm when the roller H strikes against the face of the inclined gate J and pass overj the graintable without raking.

So soon, however, as the roller H begins to leave its track the spring returns the rake to its nomal position.

It will be observed that/no locking trip, catch, stud, or bolt of any description, with their necessary complication of parts and fragility, is employed under this construction on the rake, but that the rake is retained. in and returned to position after displacement by a spring of a simple and lasting form.

The tripping mechanism consists of an upright post, K, which is supported in lugs formed on the gear-casing K, and is provided with an arm, K which overhangs the upper edge of the crown-wheel B. On the upper face of the crown-wheel a block, B, is provided. This block is arranged, as the wheel B revolves, to strike against and engage with the arm K turning the arm and post in their bearings, say, a quarter of a revolution, more or less. This movement of the post is utilized, by means of the crank K and rod K, for the purpose of. withdrawing the latch L, which holds the gate J in the position shown in Fig. 1.. So soon, however, as the block B travels beyond the arm K the arm, post, and latch are returned to position by the counterbalanceweight K connected with the latch, and the latch is thus reset to receive the gate J. One or more blocks may be provided on the crownwheel for the purpose of tripping the gate, and when it is desired to use more than one rake for raking purposes the blocks are made of different heights, as shown in Fig. 2, so that by raising and lowering the post K the arm K may be made to engage with one or more of the blocks and trip the gate accordingly.

The operationof rakes by the movement 5 IOQ ing rake, and causing it to pass over the table and operate as a rake, in its progress striking against a depending wing on the gate and setting the gate for the next rake. The latch L can also be operated independently of the automatic devices by a rod connecting with a lever on the foot-board and, if desired, the post K can be thrown out of working connection with the crown-wheel by elevating the arm. above all the blocks, and the raking be governed entirely by the operator.

It is obvious that the construction and manner of arrangement of the post K and projections on the crown-wheel can be altered and modified without departing from the spirit of the invention, which is to trip the latch by the revolution of'a projection formed at a suitable place on the crown-wheel.

I claim as new and desire to secure by Letters Patent- 1. A rake-arm forharvesting-machines, with the offset shown and described, tubular throughout its entire length, and cast in one piece, substantially as and for the purpose set forth.

2. Arake-arm. F, having an offset, as described, and rolling rake-head fitted to and swinging upon said arm as a bearing, and provided with a spring, I, and stop 1, com bined with a projecting stud in line with said rake, and armed with a roller, H, and a gate or guideway, J, whereby the rake G may becaused to rotate on said rake-arm, for the purpose described.

3. A rake arm for harvesting machines, having an offset, as described, {and tubular throughout its entire length, and cast in one piece, in combination with a rolling rake-head fitted to and swinging upward as it turns upon the outer end of said arm, substantially as and for the purpose set forth.

4. A rake-arm for harvesting-machines, cast in one piece, tubular throughout its entire length, and provided with an offset, and its outer end turned true and cylindrical, with a rolling anrhswinging rake-head fitted to said cylindrical part, combined with the spring I and stop P, substantially as and for the purpose described.

5. A rake-head constructed in two sections, E E each one of which is independently adjustable on the rake by means of the slots S and bolt T, substantially as and for the purpose set forth.

6. The crown-wheel B, provided with the projection B, the vertical rotating post K, having a laterally-projecting arm or ofl'set, K and the crank K combined with the rod K and counterbalance-latch L, and the gate J, substantially as shown and described.

DAVID MAXWELL.

VVit-nesses:

111s. WHITLAW, A. H. BAIRD. 

